FileCabinet
This is an interface that predates our knowing consciously that we were multiple. We would pretend there were file cabinet drawers in our forehead and we'd open the relevant drawers in which memories were stored, and we'd sort through it, pull out folded up invisible sheets of paper to scrutinize, to find obscure information that was organized in various ways in our head (often "jokingly" having to check under several areas to find the information). This is a viable metaphor for how we keep our memories and how we access them. We've reconstructed some areas of our headmap such that the file cabinet interfaces with the Memory Chamber.